[bug] Multipage Dialogs with GCC/G++14

[d.healey]

Everything seems to compile and run with gcc/g++-14 on Debian, but multipage dialogs (like the broadcaster wizard and the new project dialog) don't render properly. They just appear as a big grey rectangle.

The CSS renderer works, so it's not that.

[Christoph Hart]

@d-healey can you compile the multipage creator app and how does that thing look?

What if you use the multipage dialog as script component?

HiseSnippet 818.3ocsUs0aSCCE1tqAwJWDSBId0ZO0gpPMazsNPvFqcCpfNpnCDOfzjmsypUSribbFKZZ+C3GK+CfiSRW6tnATIxCs4b4K9Kmy24jAFMSjjnMHbsCxhEH788Flori5LhJUndcQ3G50mlXEFRgqcxhoIIBNBiW3sNG3Eqhxu94V6PCoJlXpKD5KZIS7AYjzN06fseuLLbOJWbfLZlre918XZUGcnNE3yBdMQwT1X5wh8otzp3gdGMYDB+TuM7oAM82Xy1qwa0dU+i37f0ZuYaFa8U8awDsZQYsayEqgv2YWtzpMCsTqHAdn6n4YCGo+tp3.9hLQdTnvY3iFBmbgaTmQxP9fIEmDDBWcvzR0BEkpG60WxkW3eZI6Q4AHSQLaQCW41nj++.kvyPopETZIugLiL1NMhiO2yqmB5fATn2LKUJxEU4GXuNZHCk8YQzwh8LfwEHpudylMHvOq7xZ0f9ShkbB0PhhIuhLAEky6mFZkwPypqjFpOt9xQwK2f.HuBt.GtnXGjAP10cQKLqGD2vEwBuIIOqO0LlCEkCDmZaPNi39+Ejk6PUjLcJwHnbRjXKB4apWSFJLRcZRXVCBCRfpxzJwE4r74kGRBTkqaMoBvNHUwrRshnU6qshOppuRsypsXsyqQtZnffaLl6k2nCCElaLrSaatMf0UoQGILMfxRHPoIIB8xKKPtyem.gUzKlIQspmRZ+XrnzdOcH203c2ec4DprYB284dcoVpSgU5CxKVXrRGcvcEm.yzE5sE85JRFa0w44FECkc3IfqZyi9jR03UzFHIPhpdQwnSQXOrazOaxMnqqogoIMOMjZu7Hla4SY.nrdIcsS6pRj1rYWN8OL207Vm69ao3RdCjV1naliUtANBE7+Gbrba0C71MHPvrSIXUu8957tZ5Ob7eRmZkpi6SsFoqIueZzPXqNS.mtRIBSb86JNQWgcyI8+gBEO23WvUYPemMtLn+jfnHJynOjULL41Gd2bO.mT4euXQ3CWfMwGkOfMacNBVOeHic4G00.t57Bbs4E3ymWfslWfqOu.2XdA19OCz80y2jZ0QEiMHT+A6luQBi2UQAEXtZE8ajg.tIE

[d.healey]

@Christoph-Hart The creator app won't build for me, I think it's the same kind of issue we had with earlier versions of HISE, lots of errors like:

../../Source/Exporter.cpp:20:20: error: ‘CodeGenerator’ is not a member of ‘hise::multipage’; did you mean ‘hise::simple_css::CodeGenerator’?
   20 |         multipage::CodeGenerator cg(rootDir, projectName, exportObj);

Your test snippet opens with a blank window also.

However, I noticed that with a debug build the multipage dialogs do display properly.

So I tried the release build with different optimisation settings. (Link time optimisation was enabled for all tests).

-O0 - Dialogs show
-O1 - Dialogs show
-O2 - No dialogs
-O3 - No dialogs

[d.healey]

Bump, the issue is still there with the latest version of GCC/G++.

[d.healey]

@Christoph-Hart Adding -fno-strict-aliasing to the compiler flags makes the multipage dialogs show up again.

I think it's something to do with the way the std:bind is being used in these macros, I think it's confusing the optimisation system.

#define BIND_MEMBER_FUNCTION_0(x) std::bind(&x, this)
#define BIND_MEMBER_FUNCTION_1(x) std::bind(&x, this, std::placeholders::_1)
#define BIND_MEMBER_FUNCTION_2(x) std::bind(&x, this, std::placeholders::_1, std::placeholders::_2)
#define BIND_MEMBER_FUNCTION_3(x) std::bind(&x, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)

But this is way beyond my c++ foo so I could be very wrong.